期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 26, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.264505
关键词
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资金
- EPSRC [EP/F047991/1]
- Microsoft Research Connections
- Engineering and Physical Sciences Research Council [EP/H025405/1, EP/F047991/1] Funding Source: researchfish
- EPSRC [EP/H025405/1, EP/F047991/1] Funding Source: UKRI
Ultrafast magnetic resonance imaging, employing spiral reciprocal space sampling and compressed sensing image reconstruction, is used to acquire velocity maps of the liquid phase in gas-liquid multiphase flows. Velocity maps were acquired at a rate of 188 frames per second. The method enables quantitative characterization of the wake dynamics of single bubbles and bubble swarms. To illustrate this, we use the new technique to demonstrate the role of bubble wake vorticity in driving bubble secondary motions, and in governing the structure of turbulence in multiphase flows.
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